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  1. //Saliha Babar                CS1A               Chapter 4, Page 221, #9
  2. //
  3. /************************************************************************
  4.  * 
  5.  * VALIDATES USER INPUT FOR A MATH QUESTION
  6.  * ______________________________________________________________________
  7.  * This program calculates the sum of two random numbers and then
  8.  * validates user input for that question.
  9.  * 
  10.  * Computation is based on the formula;
  11.  * sum = first random number + second random number
  12.  *________________________________________________________________________
  13.  * INPUT 
  14.  *    firstNum         : first random number generated
  15.  *    secondNum        : second random number generated
  16.  *    userAnswer       : number entered by user for the question
  17.  * 
  18.  * 
  19.  * OUTPUT
  20.  *    sum              : total of first number and second number
  21.  *    This program validates user input
  22.  * *********************************************************************/
  23.  
  24. #include <iostream>
  25. #include <iomanip>
  26. #include <ctime>
  27. #include <cstdlib>
  28.  
  29. using namespace std;
  30.  
  31. int main() {
  32. 	int firstNum;         // OUTPUT - first random number generated below 1000
  33. 	int secondNum;        // OUTPUT - second random number generated below 1000
  34. 	unsigned seed = time(0); // INPUT - seed value to generate random numbers
  35.    	int userAnswer;         // INPUT - user answer for the question
  36. 	int sum;              // OUTPUT - sum of two random numbers
  37.  
  38.  
  39. 	// Seed the random number generator
  40. 	srand (seed) ;
  41.  
  42. 	// Generate two random numbers below 1000
  43. 	firstNum = 1 + rand() % 1000;
  44. 	secondNum = 1 + rand() % 1000;
  45.  
  46. 	// Calculate the total of two random numbers
  47. 	sum = firstNum + secondNum;
  48.  
  49. 	// Greet the user :)
  50. 	cout << "Hello, I'm your math tutor. Lets do a math question\n";
  51. 	cout << "Press Enter to start !\n";
  52. 	cin.get();
  53.  
  54. 	// Display the question to the user
  55. 	cout << setw(6) << firstNum << endl;
  56. 	cout << "+" << setw(5) << secondNum << endl;
  57. 	cout << "______" << endl;
  58.  
  59. 	// Let user to enter answer
  60. 	cout << "Think about the answer\n";
  61. 	cout << "Enter your answer below.\n";
  62. 	cin >> userAnswer ;
  63.  
  64. 	// Input validation
  65. 	if (userAnswer == sum)
  66. 	{
  67. 		cout << "Congrats, your answer was correct!\n";
  68. 	}
  69. 	else 
  70. 	{
  71. 		// Display the answer 
  72. 		cout << "Your answer was incorrect, Here's the correct answer\n";
  73. 		cout << setw(6) << firstNum << endl;
  74. 		cout << "+" << setw(5) << secondNum << endl;
  75. 		cout << "______" << endl;
  76. 		cout << setw(6) << sum << endl;
  77. 	}
  78.  
  79.  
  80. 	return 0;
  81. }
Success #stdin #stdout 0.01s 5276KB
comments (?)
stdin 
Standard input is empty
stdout 
Hello, I'm your math tutor. Lets do a math question
Press Enter to start !
    29
+  770
______
Think about the answer
Enter your answer below.
Your answer was incorrect, Here's the correct answer
    29
+  770
______
   799
https://ideone.com/zdbqg4
HW - Chapter 4 Math Tutor ( continuation of Chapter 3 )
language:
C++ (gcc 8.3)
created:
112 days ago
visibility:
public

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